The Role of Echocardiography in the Assessment of Mechanical Dyssynchrony and Its Importance in Predicting Response to Prognosis After Cardiac Resynchronization Therapy

Prevalência e valor prognóstico da dissincronia ventricular na cardiomiopatia chagásica

“…When analyzing the precision of dyssynchrony measurements, we can see a lower intraobserver variability, when compared with the interobserver one. These reflect, in a certain way, the high variability of these values that have been previously reported in the literature [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] . The recently published study PROSPECT showed a low predictive value of the echocardiogram in relation to dyssynchrony.…”

“…It was determined as the difference in the time intervals of Q wave to the onset of flow in the pulmonary artery compared with the time intervals of Q to the onset of aortic flow, respectively. A value > 40 ms is considered to be abnormal 13 . Ejection fraction was calculated by the modified Simpson's method.…”

Echocardiography in the assessment of left ventricular longitudinal systolic function: current methodology and clinical applications

“…Post-systolic shortening may occur in nonischaemic conditions such as LV hypertrophy, LV volume overload, and left bundle branch block, and has been reported in [30% of segments in normal individuals [77]. TVI allows accurate evaluation of myocardial systolic time intervals and plays a major role in the management of patients candidated to cardiac resynchronization therapy (CRT) for the assessment of LV dyssynchrony [78]. However, a detailed description of the applications of TVI in this field is beyond the aim of this review.…”

Risk of Death and Need for Transplantation in Chronic Pulmonary Hypertension

“…However, this is a well-described limitation that holds true when analyzing not only cPH patients but also patients with cardiomyopathy, heart failure and postmyocardial infarction. [33][34][35][36][37] Furthermore, when we pursue this type of analyses, neither did all patients started therapy at the same time nor did all patients respond similarly to comparable medications. Furthermore, it is important to point out that all cPH patients are not treated equally as some patients were receiving single PH drug therapy, whereas others were on multiple medications.…”